Trailer Brakes Dont Work w/2008 Silverado but Other Trailers Work and Other Trucks Work w/Trailer  

Question:

Expert Reply:

It sounds like there is a short somewhere because you should not be getting fluctuating voltage readings. Usually this is caused by a dirty/corroded trailer connector and/or a loose wire. Make sure the truck and trailer side connectors are clean and free of corrosion inside where the wires attach and outside on the pins. While inside the connectors you can check for loose connections.

Every vehicle's tow package wiring is different and sometimes a trailer function will work with one truck and not another like in this case.

You can also test the brake controller and the trailer brake magnets (articles on these subjects linked for you) but since the trailer works fine with other trucks and the truck works fine with other trailers it seems unlikely that the brake controller or magnets are to blame.

expert reply by: Michael H

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